ProbeRobot.java contains come code developed by the SQE group and was checked
into the JDK source tree for awhile. But it was decided to not use ProbeRobot
in the publicly shipped version of Robot, and to keep it soley as an internally
developed/used/maintained tool. Further there is a whole lotta support code
required by ProbeRobot that isn't in the source tree.

Fortunately this class is not listed in .../build/share/minclude/* meaning
the .class file doesn't make it into rt.jar.

Robi had meant to remove this file as I recall.